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I would use a minimum of 8ga wire.Using less will charge the battery over time, but it won't start the bike.
What about using a pair of 30 amp non-cycling breakers instead of regular fuses? If tripped, they will reset when circuit is disconnected. Not as cheap as fuses, but cheaper than a tow if no spare fuses can easily be had. One of the better “crude” aspects of older Harley Davidsons is the use of a breakers in place of fuses. A regular cycling breaker is connected to the positive terminal for the majority of the circuits. It makes getting a bike back in service or onto the road with no spare fuses much easier. Fwiw, I still have my set of “official” Moto Guzzi jumper cables that I bought for my V7 Sport from Harper’s at Daytona Bike Week in 1994. Pretty sure the plastic bag labeling is even in Italian. Maybe they still sell them?
Actually, you can 'push start' a Convert. Its in the book. Requires something like 35mph. NOT ME! Recent discussion on the Convert Forum IIRC.Get creative. Only one piece of wire like a fence wire. Be careful. Lean the two bikes together metal to metal. (Crash bars against each other?) There's your ground. Wear your gloves. Jam the fence wire +ve to +ve and away we go.Patrick HayesFremont CA
N3303j said,FWIW:Ran into a guy in a parking lot with a dead jeep and a set of standard jumper cables. STARTED him up with my T3 (Odyssey 925). Surprised both of us.
I guess I'm the "buy it" vs "built it" kind of guy. I carry these on long trips: https://www.amazon.com/gp/product/B000WMRO3M/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 Pics look big, but they are smaller jumper cables designed for motos. My thinking, if I am riding solo, and end up with a dead battery, getting a jump from a moto person or car/truck/suv person ... these look very normal and most people understand a jump start and normal looking jumper cables. So far they have been carried around for maybe 10,000 miles and never used.
Dave, a related question for you.I have a Ducati with a full fairing on it, the battery is buried in it. I have an SAE connector (7 amp) that I use to trickle charge and a cigarette plug that I can use to run a compressor, etc.I'm most concerned about needing a jump. Since the battery is buried f I rigged a direct wire with a post, 1) What gauge of wire and type of post, 2) do I need to hook a ground wire too?
I think one of these might well be a better but more expensive answerhttps://www.amazon.com/Best-Sellers-Jump-Starters/zgbs/automotive/318336011
I agree with Frenchfrog. We have carried a NOCO Boost jump starter on motorcycle trips and in my personal and company vehicles for many years.I have used it for jumping bikes many times - all successfully.
You should be able to find a good ground on the engine block somewhere.Is there a cable on the starter that you can access? If you attach any wire to the battery long term, you really need to fuse it at the battery.
It would go straight to the battery. what size fuse & wire gauge to you recommend?The engine would provide enough ground to despite being aluminum and painted?
The aluminum block is a very good conductor. Even the steel in the frame is a great conductor, because it is so large.
....but the oaint is a perfect insulator. Any connection must be on bare metal.
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